wangyum opened a new pull request #30535:
URL: https://github.com/apache/spark/pull/30535
### What changes were proposed in this pull request?
This pr make Hive Metastore support filter by string type with date values,
a common case is:
```scala
spark.sql("create table t1(id string) partitioned by (part string) stored as
parquet")
spark.sql("insert into t1 values('1', '2019-01-01')")
spark.sql("insert into t1 values('2', '2019-01-02')")
spark.sql("select * from t1 where part = date '2019-01-01' ").show
```
By
[default](https://github.com/apache/spark/blob/6d31daeb6a2c5607ffe3b23ffb381626ad57f576/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/TypeCoercion.scala#L126-L129),
we use `DateType` to compare `StringType` and `DateType`.
### Why are the changes needed?
Improve query performance.
### Does this PR introduce _any_ user-facing change?
No.
### How was this patch tested?
Unit test.
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